BLS TEST EXAM LATEST 2026|2027 UPDATED QUESTIONS WITH
DETAILED VERIFIED ANSWERS (100%) | ALREADY GRADED A+
What is the rate of compressions for adults, children and infants? - Correct Answer -The UNIVERSAL rate
for all in cardiac arrest is 100 - 120 bpm.
What is the compression-to-ventilation ratio for single rescuers with adults, children and infants? -
Correct Answer -30:2
What is the compression-to-ventilation ratio for 2 rescuers with adults, children and infants? - Correct
Answer -adults = 30:2
children = 15:2
infants = 15:2
What is the hand placement for compressions in infants? - Correct Answer -2-finger technique (2 fingers
vertically, just below the nipple line); don't press on the xiphoid process
2 thumb-encircling hand technique (place both thumbs side-by-side in a horizontal fashion, thumbs may
be placed on top of each other with very tiny infants)
Does the 2-finger technique or 2 thumb-encircling hand technique produce greater blood flow? - Correct
Answer -2 thumb-encircling hand technique
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,This compression technique is recommended for infants when CPR is provided by 2 rescuers as it:
*produces better supply to the heart muscle
*helps ensure consistent depth and force of chest compressions
*may generate higher blood pressures - Correct Answer -2 thumb-encircling hands technique
Why is it especially important to provide rescue breathing to children and infants in cardiac arrest? -
Correct Answer -When SUDDEN cardiac arrest occurs, the oxygen content of the blood is typically
adequate to meet oxygen demands of the body for the first few minutes after arrest. So delivering chest
compressions is an effective way of distributing oxygen to the heart and brain.
In contrast, infants and children often have respiratory failure or shock BEFORE a cardiac arrest which
reduces the oxygen content of the blood. Chest compressions for children and infants won't be adequate
by themselves. Rescue breathing must happen in addition to chest compressions for CPR to be effective.
What is the correct compression-to-ventilation ratio for a single rescuer of a 3-year-old child?
a. 15:1
b. 15:2
c. 20:2
d. 30:2 - Correct Answer -d. 30:2
2|Page
,What is the correct compression-to-ventilation ratio for a 7 yo when 2 or more rescuers are present?
a. 15:1
b. 15:2
c. 20:2
d. 30:2 - Correct Answer -b. 15:2
For what age victim is the 2 thumb-encircling hands technique recommended when 2 or more rescuers
are present?
a. a child less than 3 yo
b. a child older than 3 yo
c. an infant older than 1 yo
d. an infant younger than 1 yo - Correct Answer -d. an infant younger than 1 yo
What is the correct chest compression depth for a child?
a. at least 1/4 the depth of the chest, or about 1 inch
b. at least 1/3 the depth of the chest, or about 1.5 inches
c. at least 1/3 the depth of the chest, or about 2 inches
d. at least 1/2 the depth of the chest, or about 3 inches - Correct Answer -c. at least 1/3 the depth of the
chest, or about 2 inches
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, What is the correct chest compression depth for an infant?
a. at least 1/4 the depth of the chest, or about 1 inch
b. at least 1/3 the depth of the chest, or about 1.5 inches
c. at least 1/3 the depth of the chest, or about 2 inches
d. at least 1/2 the depth of the chest, or about 2.5 inches - Correct Answer -b. at least 1/3 the depth of
the chest, or about 1.5 inches
How do AEDs know to deliver an adult dose or peds dose? - Correct Answer -If the AED is adult and child
compatible, it will deliver the dose based on whether adult pads or children pads are used.
Sometimes the AED has a key or switch that will deliver a child shock dose. If so turn that switch on.
The AED shock dose may also be reduced by pediatric cables, an attenuator or preprogramming in the
device. One commonly used method for reducing a shock dose is a pediatric dose attenuator. When
attached to an AED, it reduces the shock dose by about 2/3.
Can child AED pads be used on a pulseless infant? - Correct Answer -Yes (make sure the pads don't touch
or overlap)
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DETAILED VERIFIED ANSWERS (100%) | ALREADY GRADED A+
What is the rate of compressions for adults, children and infants? - Correct Answer -The UNIVERSAL rate
for all in cardiac arrest is 100 - 120 bpm.
What is the compression-to-ventilation ratio for single rescuers with adults, children and infants? -
Correct Answer -30:2
What is the compression-to-ventilation ratio for 2 rescuers with adults, children and infants? - Correct
Answer -adults = 30:2
children = 15:2
infants = 15:2
What is the hand placement for compressions in infants? - Correct Answer -2-finger technique (2 fingers
vertically, just below the nipple line); don't press on the xiphoid process
2 thumb-encircling hand technique (place both thumbs side-by-side in a horizontal fashion, thumbs may
be placed on top of each other with very tiny infants)
Does the 2-finger technique or 2 thumb-encircling hand technique produce greater blood flow? - Correct
Answer -2 thumb-encircling hand technique
1|Page
,This compression technique is recommended for infants when CPR is provided by 2 rescuers as it:
*produces better supply to the heart muscle
*helps ensure consistent depth and force of chest compressions
*may generate higher blood pressures - Correct Answer -2 thumb-encircling hands technique
Why is it especially important to provide rescue breathing to children and infants in cardiac arrest? -
Correct Answer -When SUDDEN cardiac arrest occurs, the oxygen content of the blood is typically
adequate to meet oxygen demands of the body for the first few minutes after arrest. So delivering chest
compressions is an effective way of distributing oxygen to the heart and brain.
In contrast, infants and children often have respiratory failure or shock BEFORE a cardiac arrest which
reduces the oxygen content of the blood. Chest compressions for children and infants won't be adequate
by themselves. Rescue breathing must happen in addition to chest compressions for CPR to be effective.
What is the correct compression-to-ventilation ratio for a single rescuer of a 3-year-old child?
a. 15:1
b. 15:2
c. 20:2
d. 30:2 - Correct Answer -d. 30:2
2|Page
,What is the correct compression-to-ventilation ratio for a 7 yo when 2 or more rescuers are present?
a. 15:1
b. 15:2
c. 20:2
d. 30:2 - Correct Answer -b. 15:2
For what age victim is the 2 thumb-encircling hands technique recommended when 2 or more rescuers
are present?
a. a child less than 3 yo
b. a child older than 3 yo
c. an infant older than 1 yo
d. an infant younger than 1 yo - Correct Answer -d. an infant younger than 1 yo
What is the correct chest compression depth for a child?
a. at least 1/4 the depth of the chest, or about 1 inch
b. at least 1/3 the depth of the chest, or about 1.5 inches
c. at least 1/3 the depth of the chest, or about 2 inches
d. at least 1/2 the depth of the chest, or about 3 inches - Correct Answer -c. at least 1/3 the depth of the
chest, or about 2 inches
3|Page
, What is the correct chest compression depth for an infant?
a. at least 1/4 the depth of the chest, or about 1 inch
b. at least 1/3 the depth of the chest, or about 1.5 inches
c. at least 1/3 the depth of the chest, or about 2 inches
d. at least 1/2 the depth of the chest, or about 2.5 inches - Correct Answer -b. at least 1/3 the depth of
the chest, or about 1.5 inches
How do AEDs know to deliver an adult dose or peds dose? - Correct Answer -If the AED is adult and child
compatible, it will deliver the dose based on whether adult pads or children pads are used.
Sometimes the AED has a key or switch that will deliver a child shock dose. If so turn that switch on.
The AED shock dose may also be reduced by pediatric cables, an attenuator or preprogramming in the
device. One commonly used method for reducing a shock dose is a pediatric dose attenuator. When
attached to an AED, it reduces the shock dose by about 2/3.
Can child AED pads be used on a pulseless infant? - Correct Answer -Yes (make sure the pads don't touch
or overlap)
4|Page
